Here are some calculators you may find useful.

Home Purchase Calculator - This calculator calculates U.S. and Canadian monthly mortgage payments based on principal, interest and term.

Mortgage Refinancing Calculator - This calculator will help you to decide whether or not you should refinance your current mortgage at a lower interest rate.

Credit Card Minimum Payment Interest Calculator - This calculator will show you how much interest you will end up paying if you make only the minimum required payment on your credit card bill.